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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3*x)/x-3 = (17*x^2)/x-3+5 // - (17*x^2)/x-3+5
(3*x)/x-((17*x^2)/x)-5-3+3 = 0
(3*x)/x-17*x-5-3+3 = 0
-17*x-2 = 0 // + 2
-17*x = 2 // : -17
x = 2/(-17)
x = -2/17
x = -2/17
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